org.jooq.Comparator Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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*
* Other licenses:
* -----------------------------------------------------------------------------
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package org.jooq;
/**
* A comparator to be used in conditions to form comparison predicates.
*
* Comparison operators listed here can be used to compare {@link Field} or
* {@link Row} values with other {@link Field} or {@link Row} values, or with
* {@link Select} or {@link QuantifiedSelect} values.
*
* The following flags indicate whether the comparator can be used as:
*
* - a quantified comparison operator: {@link #supportsQuantifier()}. Example:
*
X = ANY (A, B, C)
* - a subselect comparison operator: {@link #supportsSubselect()}. Example:
*
X = (SELECT A)
*
*
* @author Lukas Eder
*/
public enum Comparator {
@Support
IN("in", false, true),
@Support
NOT_IN("not in", false, true),
@Support
EQUALS("=", true, true),
@Support
NOT_EQUALS("<>", true, true),
@Support
LESS("<", true, true),
@Support
LESS_OR_EQUAL("<=", true, true),
@Support
GREATER(">", true, true),
@Support
GREATER_OR_EQUAL(">=", true, true),
@Support
IS_DISTINCT_FROM("is distinct from", false, false),
@Support
IS_NOT_DISTINCT_FROM("is not distinct from", false, false),
@Support
LIKE("like", false, false),
@Support
NOT_LIKE("not like", false, false),
@Support
LIKE_IGNORE_CASE("ilike", false, false),
@Support
NOT_LIKE_IGNORE_CASE("not ilike", false, false),
;
private final String sql;
private final boolean supportsQuantifier;
private final boolean supportsSubselect;
private Comparator(String sql, boolean supportsQuantifier, boolean supportsSubselect) {
this.sql = sql;
this.supportsQuantifier = supportsQuantifier;
this.supportsSubselect = supportsSubselect;
}
/**
* A SQL rendition of this comparator.
*/
public String toSQL() {
return sql;
}
/**
* Whether this comparator supports quantifiers on the right-hand side.
*/
public boolean supportsQuantifier() {
return supportsQuantifier;
}
/**
* Whether this comparator supports subselects on the right-hand side.
*/
public boolean supportsSubselect() {
return supportsSubselect;
}
}